/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraEvents.h
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)(EditInlineNew) class UNiagaraEventReceiverEmitterAction_SpawnParticles : public [UNiagaraEventReceiverEmitterAction](API\Plugins\Niagara\UNiagaraEventReceiverEmitterActi-)
uint32
NumParticles
Number of particles to spawn per event received.